Gas range cooking top



1944- c. E. PARKER GAS RANGE COOKING TOP Filed Feb. 29, 1940 chi/2 5F235;

er M4 03am PM Patented Jan. 25, 1944 GAS men COOKING 'ror Claude E. Parker. Chicago, 11]., assignor to Gas Productsco poration, Chicago, 11]., a corporation of Illinois Application February 29, 1940. Serial No. 921,499

'2 Gains. (01. 126-39) The invention relates to a gas rang cooking top. The present application is a continuation in part of my copending pplication Serial No. 272,984, flied May 11, 1939, now Patent No. 2,257,- 396, September 30, 1941.

Generally stated. the object of the present invention is to provide in a gas cook stove, a novel arrangement of parts to facilitate the adjustment of the primary air and fuel mixture for theburner or burners.

More specifically, it is an object of the invention to provide in a cook stove having a continuous top plate or panel, apertured only for the burner units, an improved arrangement of the parts such that the shutters for the prim y air to the burners and the needle valve controlling the supply of raw gas can be adjusted by reaching down through the burner unit holes in the top plate and without the necessity of removing the top plate or the burners themselves.

Another object is to provide in a cooking top structure having a top burner and front wall an improved construction and arrangement per.- mitting the easy insertion and removal of the burner heads.

Further objects and advantages of the invention will become apparent as the following description proceeds taken in connection with the accompanying drawing in which:

Figure 1 is a fragmentary plan view of a cooking top, embodying the present invention, a portion of the structure being broken away to show the location of the primary air adjustment shutters.

Fig. 2 is a fragmentary plan view of one of the burner units with the grate removed.

Fig. 3 is an enlarged front elevation of one of the primary air adjustment mechanisms.

Fig. 4 is an enlarged side elevation of one of the burner units, with the top plate in section substantially along the line H in Fig. 1. 7

While the invention is susceptible of various modifications and alternative constructions, I have shown in the drawing and will herein describe in detail, the preferred embodiment, but it is to be understoodthat I do not thereby intend to limit the invention to the specific form disclosed. but intend to cover all modifications and alternative constructions falling within the spirit and scope of the invention as expressed in the appended claims.

For purposes of exempliilcation the invention has been shown and described herein as embodied in a cook stove of the modern cabinet or closed top typ in which the front wall is closed, with only thebumer control handles Ill projecting through it (Fig. 1). On the top of the stove is a porcelain enameled sheet metal top plate ll, substantially imperforate and completely closing the top of the stove except for a series of round burner apertures I 2.

Though various forms of burner heads may be used, a radial arm type, and particularly the three arm form shown, is especially desirable in a stove embodying the present invention, for reasons which will appear below. As indicated, the burner units embody heads l3 and II, which are of the Bunsen type and are ported to emit flames upwardly and laterally beneath utensils (not shown) seated above the same. Other than for the feature noted, the construction of the heads is not concerned in the present invention and hence need not be detailed here. These bumer heads are suitably mounted beneath the apertures I! as, for example, on horizontal rods I! (Fig. 4). Both of the burners are supplied with gas from a manifold l5 extending along the front of the stove beneath the top plate II. In the case of the front burner head H, th gas is led from the manifold I 5 through a control valve l6, manually operated by the corresponding handle Ill, and a Venturi tube [1. Similarly. gas is supplied to the rear burner head I3 from the manifold l5 through a control valv I8 and a. Venturi tube l9. The Venturi tubes l1 and I8 are disengageably supported in the conventional manner upon the nozzles of the control valves l6.

At the inlet end of the front burner Venturi tube I1 is a primary air control means, shown (Fig. 3) in the form of a pair of sheet metal shutters 20 pivoted on the front end of the tube by a screw 2| and overlying primary air inlet ports 22. By swinging these shutters about their pivot 2|, the amount of air entering the ports 22, and mixed with the gaseous fuel. can, of course, be regulated as desired. Integral ears 23 at the upper comers of the shutters, located in positions to be easily grasped, facilitate their adjustment. An identical primary air adjustment means is provided on the Venturi tube l9 for the rear burner head.

To regulate the flow of raw gas into the front burner Venturi tube I I, a needle valve 24 (Fig. 4) of conventional form is provided. It is adjustable by rotation of a hexagonal collar 25. A similar needle valve 25 (Fig. 1) is provided for the rear burner.

In accordance with one aspect of the present invention, the primary air regulating shutters 20 and the needle valves 24 and 2' for both the front andrearburners II and II arelocatedin registry with, and beneath, the top plate aperture II, which receives the front burner unit. It will be observed. upon reference to Fig. 2, that the threearm front burner head II is arranged with one of its arms projecting forwardly and the Venturi tubes l1 and I! are disposed on oppodte sides of this arm and in the spaces between such arm and the respective adjacent rear arms of the burner head. Consequently, ample clearance is provided,

in so far as the burner head itself is concerned,

for easy access to the adjustable shutters 20 on the respective Venturi tubes even though the latter are located within the comflnes of a circle circumscribing the burner head. Equally easy access to the needle valves is also afforded. The aperture I2 is large enough so that the shutters and needle valve adjustment collars lie within its confines and are completely exposed. for easy manipulation simply by removing one part,

namely, the grate 21. Also to be particularly noted is the fact that the shutters 20 and the needle valves are located closely adjacent the top plate ll (Fig. 4) so that they can readily be reached throughthe top plate aperture l2, and their position of adjustment easily observed.

Removably mounted in the top plate apertures l2, above the burner heads l3 and H, are utensil supporting grates 21 of any suitable form. They may if desired be in the form of removable hearth and utensil support units like that shown in my copending application Serial No. 272,984 referred to above and in which event the refractory material of the hearth overlies and thermally protects the needle valves. In the present instance the utensil supports embody simply a cast iron border ring with integral, inwardly projecting utensil supporting fingers on it.

To adjust the regulating shutters 2| for either the front or rear burners I4 and If, it is necessary simply to remove the grate 21 for the front burner head. Thereupon the shutters 20, for both of the Venturi tubes l1 and IS, are exposed (as in Fig. 2) for ready access through th front burner opening I! in the top plate H. To effect the necessary adjustments the operator grasps the ears 23 and shifts the position of the shutters 20 until the primary air and fuel mixture is such as to give a desired condition of combustion. Similarly, to adjust the needle valves 24, 26, the operator simply reaches down in the same hole and adjusts the valves as required with the usual orifice wrench.

To those familiar with the procedure previously followed in making primary air and needle valve adjustments, the simplicity of manipulation for the present apparatus will be remarked at once. All of the usual cumbersome business of disassembling practically the entire top of the stove, in order to gain access to the adjusting means, is obviated. In other words it is no longer necessary to remove a plurality of grates, key plates, front panels and various other parts to get at the shutters which have heretofore been buried deep beneath the stove top structure, Consequently, it is possible. by virtue of the present invention. to utilize a substantially closed or cabinet top on the stove and particularly, a continuous 5 top plate apertured only for the burner rmits, and still obviate any difficulties of adjustment for the burners.

It will also be observed that the construction and arrangement set forth permits of the easy insertion and removal of the burners from the stove. For this purpose it is only 11 to remove the grates 21 and lift the burner heads out of their respective apertures in the top as permitted by the disengageable connection between theVenturi tubes l1 and I9 and the nozzles of the gas valves I 6, it being noted that the apertures in the top panel are relatively large as compared to the size of the burner heads.

1 claim as my invention:

1. In a gas cook stove, the combination of a sheet metal top plate having front and rear burner apertures therein and otherwise substantially imperforate so as to present a closed top, burner heads substantially triangular in form in 25 respective ones of said apertures, each of said burner heads presenting a plurality of radially projecting arms, the front burner having one arm projecting forwardly toward the front of the stove, a Venturi supply tube for each of said heads having an adjustable air regulating shutter at its inlet end, means to supply gas to said Venturi tubes, and utensil supporting grids removably seated upon said top plate and overlying the burner heads, said shutters for both of said Venturi tubes being located directly beneath and accessible through the top plate aperture for the front burner and disposed on opposite sides of the forwardly projecting arm on the front burner and substantially equidistantly therefrom,

2. A gas cook stove having, in combination, a sheet metal top plate, a gas supply manifold along and beneath the forward edge of the top plate,

said top plate having front and rear burner apertures with a common center line extending perpendicular to said manifold and being otherwise substantially imperforate so as to present a closed top, a burner head supported centrally in each of said apertures and each having rigid therewith a mixing tube extending forwardly therefrom for disengageable association with said manifold, and

utensil supporting grids removably mounted on said top plate above said burner heads, the tubes for the front and rear burners being disposed in closely spaced parallel relation on opposite sides of said common center line with the forward ends of the tubes terminating closely beneath the forward edge of the front burner aperture, said mixing tubes having individual regulating means thereon, accessible through such front burner aperture upon the removal of the front utensil supporting grid only, said burner apertures being sufflciently large relative to the size of the burner heads to permit removal of said heads and their mixing tubes through said apertures.

CLAUDE E. PARKER. 

